Swim fin



FIG. 1 is a front elevational view of the swim fin showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a perspective view thereof;

FIG. 6 is a second perspective view thereof;

FIG. 7 is a third perspective view thereof; and,

FIG. 8 is a fourth perspective view thereof. 

CLAIM The ornamental design for the swim fin, as shown. 